until和when引导的时间状语从句i went to bed ____i finished my homework.A.until B.when 选哪个?那个,A为什么不行?

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until和when引导的时间状语从句i went to bed ____i finished my homework.A.until B.when 选哪个?那个,A为什么不行?

until和when引导的时间状语从句i went to bed ____i finished my homework.A.until B.when 选哪个?那个,A为什么不行?
until和when引导的时间状语从句
i went to bed ____i finished my homework.
A.until B.when 选哪个?
那个,A为什么不行?

until和when引导的时间状语从句i went to bed ____i finished my homework.A.until B.when 选哪个?那个,A为什么不行?
定语从句 表时间
when做状语从句的时候是翻译成 当.忽然/就在这时
一般形式有
was/were doing...when ...
was about to do/was onthe point of doing...when...
had done..when

这是定语从句,B是定语从局的引导词,是表示时间的
A啥都不是

B